<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <div class="app">
      <ul>
        <li v-for="(item,index) in list">{{item}}</li>
        <button @click="fn()">走一走</button>
      </ul>
    </div>
    <script src="./vue.js"></script>
    <script>
      const app = new Vue({
        el: '.app',
        data: {
          list: ['帅哥', '美女', '程序员']
        },
        methods: {
          fn() {
            const ll = this.list[0]
            this.list.push(ll)
            this.list.splice(0, 1)
          }
        }
      })
    </script>
  </body>
</html>
